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Battery charge management controllers

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article image Single and dual cell Li-Ion and Li-Polymer change management controller.

MICROCHIP Technology has introduced a family of single and dual cell Lithium-Ion (Li-Ion) and Lithium-Polymer (Li-Polymer) charge-management controllers.

The four devices in the family offer a voltage regulation accuracy of 0.5%, enabling maximum cell utilisation and enhancing the cycle life of the battery. In addition they provide safety features for low-cost, simple charging solutions.

These battery chargers are suitable for applications such as wireless handsets, PDAs, digital cameras, MP3 players, self-charging battery packs and other Li-Ion and Li-Polymer battery-powered equipment.

The MCP7384x series combines high-accuracy, constant-voltage/constant-current regulation, cell preconditioning, cell-temperature monitoring, advanced safety timers, automatic charge termination and charge status indication in space-saving MSOP packages.

The cell preconditioning supports deeply depleted batteries.

The cell-temperature monitoring (available in MCP73841/2) continuously measures the cell temperature and prevents charging when the temperature is outside the recommended temperature window.

The safety timers allow for time-based charge termination, which assures safety in the case of defective battery


These devices offer designers the flexibility to program the charge current and utilise an external field effect transistor (FET), making them appropriate for high capacity battery packs that require fast charging time.

Battery chargers’ temperature range is -40°C to 85°C.

Microchip's MCP73841/2/3/4 automatically power down when the input source is removed, minimising battery drain current. They also begin a new charge cycle when the battery voltage falls below the recharge threshold, thereby eliminating frequent trickle charge periods that are detrimental to battery life.

The devices can withstand voltages as high as 12V from loosely regulated wall adapters, reducing total system cost.

The MCP7384x are available in 4.1V, 4.2V, 8.2V and 8.4V preset voltage options to accommodate single and dual series cell Li-Ion and Li-Polymer battery packs with coke or graphite anodes.

The MCP7384x are compatible with many of Microchip's product lines including PowerSmart product portfolio, DC/DC converters and line regulators and PICmicro microcontrollers with nanoWatt Technology for power

management applications.

The MCP7384x are available in 8-pin and 10-pin MSOP.

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